In order to reconstruct the shape of scatterer d, we establish the relation between the scatterer and the far field pattern. The relation can be fixed by so called far field operator f.

为了能够重构散射体d，我们可以建立起远场模与散射体之间的联系，这种联系可以通过所谓的远场算子f来确定。

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To compare with traditional medial filter and Gaussian filter, the image denoising method based on set operator has the characteristics of shape preserving and contrast invariant.

该图象去噪方法同传统的中值滤波、高斯滤波相比，具有保形、保对比度的特点。

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The dependent relationship of features is described by parent-child operator structure. The feature shape and location can be modified by design parameters.

通过设计参数来修改特征形状和定位，并采用专家系统驱动满足给定约束条件的特征几何形状。

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